Login| Sign Up| Help| Contact|

Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2011/104879
Kind Code:
Disclosed is a scroll compressor that can be easily mass produced at a low cost as a compact and lightweight structure, and in which efficient low-capacity control is possible in a super-low speed operation mode. In the compressor, a discharge guide pipe (120) that guides the refrigerant gas in a discharge heat space (123) within a discharge head cover (118), which is equipped with a release mechanism on the outer periphery of a discharge port (108) and disposed on the top plate of a fixed scroll (102), from the space (123) to the exterior of a sealed case (115), and a suction pipe (113) for suctioning the refrigerant gas are coupled together and communicated by means of a solenoid valve (122) in which opening and closing are controlled by means of a pulse-width modulation control signal, and a bypass passage is formed that guides the refrigerant gas within the space (123) from the guide pipe (120) to the suction pipe (113). When low-capacity control is necessary in a low-speed rotation range, a motor (100) is driven by means of an inverter (128) and an operation is performed in which the ratio between the operation for closing the valve (122) and the operation for opening the valve (122) with the pulse-width modulation control signal from a solenoid drive circuit (129) has been altered.

SATO Eiji (Hitachi Ltd., 832-2, Horiguchi, Hitachinaka-sh, Ibaraki 34, 〒3120034, JP)
佐藤 英治 (〒34 茨城県ひたちなか市堀口832番地2 株式会社 日立製作所 機械研究所内 Ibaraki, 〒3120034, JP)
Application Number:
Publication Date:
September 01, 2011
Filing Date:
February 26, 2010
Export Citation:
Click for automatic bibliography generation   Help
Hitachi, Ltd. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
株式会社 日立製作所 (〒80 東京都千代田区丸の内一丁目6番6号 Tokyo, 〒1008280, JP)
SATO Eiji (Hitachi Ltd., 832-2, Horiguchi, Hitachinaka-sh, Ibaraki 34, 〒3120034, JP)
International Classes:
Attorney, Agent or Firm:
The Patent Body Corporate TAKEWA INTERNATIONAL PATENT OFFICE (Kashiwaya Bldg, 6-13 Nishishinbashi 1-chome, Minato-k, Tokyo 03, 〒1050003, JP)
Download PDF: